Biotite : K(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2
Clinochlore : Mg5Al(AlSi3O10)(OH)8
Collected by:
Photo added to mindat.org
“3mm group of biotite crystals coated by clinochlore. Collected 1998 from the Loch Ainort granite.”
Steve Rust - 30th November 2000
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